Horseshoe and calk.



T. SHEPHERD.

HORSESHOE AND CALK.

APPLICATION FILED MAR. 15. 1915.

1,157,052. Patented Oct. 19, 1915.

COLUMBIA PLANDGRAPH C0. WASHINGTON. n. c.

" Be it known that I,

citizen of the United; States, residlng at THOMAS "snnrnnnn, or Diner/[Ans ERRY, Pn'NnsYLvAnrA.

HORSESHQE AND CALK. I

Specification of Letters Fatent.

. Application filed March 15, 1915. ,Seria1lfi'o. 14,432.

To all whom it may concern:

THOMAS SHEPHERD, a

Dingmans Ferry, in the county of Pike, State of Pennsylvania, have invented certain new and useful Improvements in Horseshoes and Calks; and I do hereby declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the .art to which it appertains to make anduse the same.

This invention'r'elates to certain novel and 1 useful improvements in horse shoes, and has particular application to the. construction of a removable calk for theshoe. I

In carrying out my inventlon 1t 1s my purpose to provide a detachable calk, the

body portion of which is composed of relatively soft metal, said bodyportion having a tapered central longitudinal bore therethrough which is adapted to receive a core of relatively hard metal, such as. steel,

which is tapered to conform to the taper of the bore. The result is that the metal of the body' portion being softer than the metal of the core will wear more quickly when in use, and. therefore, as the vmaterial of the body around the point of the core wears down, the end of the relatively hard core will be left projecting beyond the outer end of the calk, and "thus always provide a firm, sharp gripping point for engagement with slippery surfaces or wet ground. Inasmuch as the core and the bore into whichit fits are tapered, the core will beheld against working out of the bore and thus being lost,

' and at the same time the wedging action horse, shoes which will embody the desired of the core against the body portion of the calk will have a tendency to bindthe lattermore firmly in the shoe. I 7

His also my purpose to provide a calk for features of simplicity, efliciency, safety and reliability when-in use,.and which may be manufactured and marketed at a relatively low cost. i 1

With the above recited objects and others of a similar nature in view, my invention consists in the construction,; combination and arrangement of parts set-forth 'in'and falling within the scope of the appended a m 1 In the accompanying drawings: Figure 1 is a, perspective view of a horse shoe equipped with calks embodying my inven- "Patented Oct 1:9 191 5 tion. Fig. 2 is-a cross sectional view taken through one of the calks and the shoeon the line 2 2 of Fig. 1, the calk being shown in elevation. Fig. 3 is'a cross sectional View taken-on the line -8-3 of Fig. 2. Fig.1]:

is a perspective view of thewedge.

Referring now to the accompanying drawshoe as an entirety, with the heel portions flattened at the tread faces as at a and provided with the threaded recesses forthe receptionof the calks C. The tread face of the shoe, at opposite sides of the center of ings in detail,-the letter A indicates a horse i the toe isthickened and widened and beveled to form bosses 2 on the tread face of the ward from the outer toward the inner edge of the shoe.- Each of these bosses is also provided with athrea'ded' bore l'which is inclined upwardly and rearwardly, each bore being adapted to receive one of the calks (1,

which willbehereinafter described in detail. I will explain that while the recesses at the heelportions of the shoe are made straight or vertical so that when thehorses hoof shoe at the toe, these bosses slanting down- 3*:

rests flat upon the ground, the'calks threaded into the heel recesses will project-per pendicularly to the ground, the front- -calks are inclined or projected forwardly when' the hoof restsupon theground. No-w, as

the tendency of the animal is to dig the toe into theground in first'taking hold of the surface of the ground in stepping, by in clining the calks at the? toe as mentioned, I insure that such calks will always .be-in position to'obtain a firm grip upon the' my: prethe threaded recesses of the shoe. The body of the calk is indicated by the numeral 5 and is formed integral with the shank and is preferably rectangular in cross section with the sides tapered or beveled. The body of the calk is preferably made of relatively soft metal, such as iron or soft steel and is provided with a central longitudinal bore 7 which is also preferably square in cross section, this bore being also tapered, and with its widest end 8 communicating with the hollow shank 3, While its narrow end opens through the ground engaging ends 9 of the body of the calk. The numeral 10 indicates. a pin or core which is also square in cross section to conform to the shape of the bore of the body of'the calk, this pin being likewise tapered to correspond to the taper ofthe bore, the major portion of its length. The core or pin 10 is formed of relatively hard'metal, such as steel, and is preferably made'slightly longer than the total length of the calk itself, including the shank of the latter. The portion 11 of the core which eX- tends into the hollow shank 3 is tapered in the opposite direction to its major portion which lies Within the bore of the calk body. The inner end 12 of the core is adapted to beara-gainst the bottom of the recess 1, while the outer tread or ground engaging end 13 of the core projects slightly beyond the tread face 9 of the calk body. Thus it will be seen that by tapering the pin or core it cannot work outward through the calk body and be lost, but will be firmly wedged therein, and

at the same time will have a tendency to spread the relatively softer metal of the I the core, and at the same time the core, on

projecting entirely through the shoe will not strike against the horses hoof and thereby injure the same.

From the above description, taken in connection with the accompanying drawings, the construction and manner of employing my invention will be readily apparent. lVhen it is desired to insert a calkin the shoe, the tubular threaded shank is screwed into the threaded recess and the inner end 12 of the core will bear against the bottom recess. Thus the inward movement of the calk is limited by the bottom wall of the recess and, of course, the outward movement of the core is limited by the wedging action of the core in the bore of the calk body. Now, it will be observed that as the softer metal of the calk body wears out the ground engaging end of the calk body will wear faster than the core, and the more the soft metal of such body wears, the more the calk will project at its ground engaging end and thus always provide a sharp gripping point for engaging with the ground. It will be noted that in case a calk should be broken off at the shoe, the threaded part-of the calk may be readily removed, inasmuch as the peculiar shape of the core pin enables the latter to be easily loosened and a tool inserted in the bore from which the pin has been removed so that the broken piece of calk may be easily unscrewed by means of the tool and a new calk inserted, and it will further be noted that this insertion of the new calk may be accomplished without removing the shoe from the hoof for the purpose of heating such shoe and subsequently using a drill or punch to remove the stud or shank of the calk, as is necessary with the usual removable calk, the use of such punch or drill generally injuring the thread of the bore. It will also be seen that there is no shoulder on my calk to prevent it penetrating the ice clear to the shoe, and thus insuring a much better hold on the ice or ground than is possible with the ordinary form of calk. Yet such calk may be easily unscrewed or set with a wrench or similar tool.

I further wish to direct attention to the peculiar construction of the toe of my shoe, inasmuch as by forming it as 'hereinbefore described,'I insure that the calks will be given the proper slant or pitch forward, thus insuring a much better hold on slippery surfaces, especially where great pullanimal.

VVhile I have herein shown and described one particular embodiment of my invention,

I 'wish it to be understood that I do not confine myself to all the precise details of construction herein set forth by way of illustratio-n," as modification and variation may be made without departing from the spirit of the invention or exceeding the scope of the appended claims.

What I claim is: I

1. The combination with a shoe having a threaded recess therein extending but part way through the shoe, of a calk comprising a tubular shank section adaptedto be threaded into the recess, a body section of relatively soft metal having a tapered bore eX- tending longitudinally therethrough and communicating with the tubular shank, and a tapered core pin of relatively hard material passing through the bore of the body section and having itsinn'er end adapted to bear against the bottom wall of the recess and its outer end to project slightly beyond the outer or ground engaging end of the calk body.

2. The combination with a horse shoe having a threaded recess therein opening through the outer faceof the shoe, of a calk having a tubular shank section threaded into wall of the recess of the shoe and to project 10 at its outer end beyond the ground engaging end of the ealk. T

In testimony whereof, I aflix my signature, in the presence'of two witnesses.

THOMAS SHEPHERD.

the recess and a tapered body section of rel.- atively soft material formed integral with the shank section, said tapered body section having a tapered bore extending longitudinally therethrough and communicating with the tubular shank, and a core pin tapered to correspond to the taper of the bore passing through said bore and adapted to bear at its inner end against the bottom Witnesses: Y

J. IIENRY' LUDWIG, WiLLIAM BOYD.

Copies 01 this pat ent maybe obtained for five cents each, by addressing the Commissioner of Patents;

a Washington, D. G. 

